Webber on Alonso at Eau Rouge
Schumacher on Hamilton in Loews
Webber on Alonso in Singapore (maybe both passes)
Vettel on Rosberg in Spa
Vettel on Alonso in Monza
Hamilton on Button and Vettel in Shanghai
Hamilton on Alonso at Nurburgring
Hungaroring – not sure who, but someone took advantage of lapped cars
Vettel on Hamilton at Korea
Button in Spa, some great ones but can’t remember specificaly

Not sure if battles count:
McLarens in Istanbul
McLarens at Hungaroring
Webber vs. Hamilton in Korea